ER nurse Emma returns home for her younger sister Sophie’s lavish wedding, only to discover a terrifying truth: every night at 11:54 p.m., Sophie is thrust into a deadly crisis—and whenever Emma dies trying to save her, she wakes up again at 8:07 the same morning. Trapped in an endless time loop, Emma uses each reset to search for the killer and uncover the truth. But the deeper she digs, the more she realizes that Sophie’s death is tied to a medical secret buried twelve years ago—and a dark conspiracy hidden within their own family. Even crueler is what happens between Emma and Noah. She remembers every moment they shared, every promise, and every time they fell in love. But with each reset, Noah forgets her completely. And somehow, every single time, he chooses to trust her—and fall for her all over again.